doc/go1.11: add note about go run supporting for go run pkg or go run .

Fixes golang/go#27047

Change-Id: I0dd40201fc03e87fbc674b47bdf9315f1783d6c2
GitHub-Last-Rev: f28ab6234ade814c4bc09e26417c424c843ad57b
GitHub-Pull-Request: golang/go#27048
Reviewed-on: https://go-review.googlesource.com/c/129696Reviewed-by: komu wairagu <komuw05@gmail.com>
Reviewed-by: Andrew Bonventre <andybons@golang.org>

doc/go1.11.html

@@ -400,6 +400,16 @@ details. <!-- CL 126275, CL 127156, CL 122217, CL 122575, CL 123177 -->
   information.
 </p>
 
+<h3 id="run">Run</h3>
+
+<p>
+  <!-- CL 109341 -->
+  The <a href="/cmd/go/"><code>go</code>&nbsp;<code>run</code></a>
+  command now allows a single import path, a directory name or a
+  pattern matching a single package.
+  This allows <code>go</code>&nbsp;<code>run</code>&nbsp;<code>pkg</code> or <code>go</code>&nbsp;<code>run</code>&nbsp;<code>dir</code>, most importantly <code>go</code>&nbsp;<code>run</code>&nbsp;<code>.</code>
+</p>
+
 <h2 id="runtime">Runtime</h2>
 
 <p><!-- CL 85887 -->